Zobrazeno 1 - 10
of 468
pro vyhledávání: '"Eisenstein J"'
Publikováno v:
Phys. Rev. Lett. 123, 066802 (2019)
Tunneling spectroscopy reveals evidence for interlayer electron-hole correlations in quantum Hall bilayer two-dimensional electron systems at layer separations near, but above, the transition to the incompressible exciton condensate at total Landau l
Externí odkaz:
http://arxiv.org/abs/1903.08262
Publikováno v:
Phys. Rev. B 98, 201406 (2018)
When two 2D electron gas layers, each at Landau level filling factor $\nu=1/2$, are close together a condensate of interlayer excitons emerges at low temperature. Although the excitonic phase is qualitatively well understood, the incoherent phase jus
Externí odkaz:
http://arxiv.org/abs/1806.02885
Publikováno v:
Phys. Rev. B 95, 195105 (2017)
In a bilayer system consisting of a composite-fermion Fermi sea in each layer, the tunnel current is exponentially suppressed at zero bias, followed by a strong peak at a finite bias voltage $V_{\rm max}$. This behavior, which is qualitatively differ
Externí odkaz:
http://arxiv.org/abs/1702.08595
Publikováno v:
Phys. Rev. Lett. 118, 186801 (2017)
Double layer two-dimensional electron systems at high perpendicular magnetic field are used to realize magnetic tunnel junctions in which the electrons at the Fermi level in the two layers have either parallel or anti-parallel spin magnetizations. In
Externí odkaz:
http://arxiv.org/abs/1701.04463
Electron tunneling spectroscopy measurements on van der Waals heterostructures consisting of metal and graphene (or graphite) electrodes separated by atomically thin hexagonal boron nitride tunnel barriers are reported. The tunneling conductance dI/d
Externí odkaz:
http://arxiv.org/abs/1610.03189
Publikováno v:
Phys. Rev. B 94, 245440 (2016)
We report simultaneous quasi-dc magnetotransport and high frequency surface acoustic wave measurements on bilayer two-dimensional electron systems in GaAs. Near strong integer quantized Hall states a strong magnetic field sweep hysteresis in the velo
Externí odkaz:
http://arxiv.org/abs/1610.02386
Publikováno v:
Phys. Rev. B 94, 125409 (2016)
The Coulomb gap observed in tunneling between parallel two-dimensional electron systems, each at half filling of the lowest Landau level, is found to depend sensitively on the presence of an in-plane magnetic field. Especially at low electron density
Externí odkaz:
http://arxiv.org/abs/1607.06171
We investigate tunneling in metal-insulator-metal junctions employing few atomic layers of hexagonal boron nitride (hBN) as the insulating barrier. While the low-bias tunnel resistance increases nearly exponentially with barrier thickness, subtle fea
Externí odkaz:
http://arxiv.org/abs/1507.01058
Publikováno v:
Phys. Rev. B 92, 115410 (2015)
Clean two-dimensional electron systems in GaAs/AlGaAs heterostructures exhibit anisotropic collective phases, the quantum Hall nematics, at high Landau level occupancy and low temperatures. An as yet unknown native symmetry-breaking potential consist
Externí odkaz:
http://arxiv.org/abs/1506.08482
Publikováno v:
Physical Review B 91, 245402 (2015)
The electronic transport properties of single layer graphene having a dilute coating of indium adatoms has been investigated. Our studies establish that isolated indium atoms donate electrons to graphene and become a source of charged impurity scatte
Externí odkaz:
http://arxiv.org/abs/1503.04191